diff --git a/Services/RecruitService.cs b/Services/RecruitService.cs
index 6f4d9ba..39c9d48 100644
--- a/Services/RecruitService.cs
+++ b/Services/RecruitService.cs
@@ -418,7 +418,7 @@ namespace BMA.EHR.Recruit.Service.Services
                         child4IdOld = org?.result?.child4Id ?? "",
                         child4ShortNameOld = org?.result?.child4ShortName ?? "",
                         orgRevisionIdOld = org?.result?.orgRevisionId ?? "",
-                        posMasterNoOld = org?.result?.posMasterNo ?? "",
+                        posMasterNoOld = org?.result?.posMasterNo,
                         positionNameOld = org?.result?.position ?? "",
                         posTypeIdOld = org?.result?.posTypeId ?? "",
                         posTypeNameOld = org?.result?.posTypeName ?? "",